Levothyroxine sodium and Thyroid function test abnormal - a phase IV clinical study of FDA data

Summary:

Thyroid function test abnormal is reported as a side effect among people who take Levothyroxine sodium (levothyroxine sodium), especially for people who are female, 60+ old, have been taking the drug for 1 - 6 months also take Synthroid, and have High blood pressure.

The phase IV clinical study analyzes which people have Thyroid function test abnormal when taking Levothyroxine sodium. It is created by eHealthMe based on reports of 122,907 people who have side effects when taking Levothyroxine sodium from the FDA, and is updated regularly.

What is Levothyroxine sodium?

Levothyroxine sodium has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 129,792 Levothyroxine sodium users. Check the latest studies of Levothyroxine sodium.

What is Thyroid function test abnormal?

Thyroid function test abnormal is found to be associated with 1,706 drugs and 1,582 conditions by eHealthMe. Check the latest studies of Thyroid function test abnormal.

On Nov, 10, 2025

122,907 people reported to have side effects when taking Levothyroxine sodium.
Among them, 752 people (0.61%) have Thyroid function test abnormal.

Could Levothyroxine sodium cause Thyroid function test abnormal?

Among these 752 people:

How long have people been on Levothyroxine sodium when they have Thyroid function test abnormal? *

What is the gender of people who have Thyroid function test abnormal when taking Levothyroxine sodium? *

female: 77.33 %
male: 22.67 %

What is the age of people who have Thyroid function test abnormal when taking Levothyroxine sodium? *

What are other drugs people take besides Levothyroxine sodium? *

What are other side effects people have besides Thyroid function test abnormal? *

Fatigue (feeling of tiredness): 217 people, 28.86%
Pain: 127 people, 16.89%
Weakness: 108 people, 14.36%
Nausea (feeling of having an urge to vomit): 102 people, 13.56%
Drug Ineffective: 101 people, 13.43%
Diarrhea: 99 people, 13.16%
Weight Decreased: 95 people, 12.63%
Weight Increased: 89 people, 11.84%
Joint Pain: 88 people, 11.70%
Stress And Anxiety: 88 people, 11.70%

What are the existing conditions these people have? *

High Blood Pressure: 79 people, 10.51%
Depression: 46 people, 6.12%
High Blood Cholesterol: 41 people, 5.45%
Pain: 40 people, 5.32%
Rheumatoid Arthritis (a chronic progressive disease causing inflammation in the joints): 39 people, 5.19%
Stress And Anxiety: 31 people, 4.12%
Renal Cell Carcinoma (a kidney cancer): 31 people, 4.12%
Sleep Disorder: 22 people, 2.93%
Bipolar Disorder (mood disorder): 21 people, 2.79%
Diabetes: 21 people, 2.79%

* Approximation only. Some reports may have incomplete information.

Do you take Levothyroxine sodium and have Thyroid function test abnormal?

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Related studies:

Effectiveness of, long term effects of, and alternative drugs to Levothyroxine sodium:

Levothyroxine sodium (129,792 reports)

Browse all side effects of Levothyroxine sodium:

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Common drugs associated with Thyroid function test abnormal:

Browse all the drugs that are associated with Thyroid function test abnormal:

Thyroid function test abnormal (1,706 drugs)

Common conditions associated with Thyroid function test abnormal:

Rheumatoid arthritis: 1,897 reports
Ms: 1,590 reports
Hypertension: 1,297 reports
Thyroid diseases: 1,022 reports
Thyroid function test abnormal: 1,020 reports
Under active thyroids: 1,006 reports
Blood cholesterol abnormal: 848 reports
Blood cholesterol increased: 844 reports
Lipoprotein test: 797 reports
Osteoporosis: 789 reports

Browse all the conditions that are associated with Thyroid function test abnormal:

Thyroid function test abnormal (1,582 conditions)

Drugs similar to Levothyroxine sodium and Thyroid function test abnormal :

How the study uses the data?

The study uses data from the FDA. It is based on levothyroxine sodium (the active ingredients of Levothyroxine sodium) and Levothyroxine sodium (the brand name). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.